diff options
Diffstat (limited to 'target/linux/ifxmips/files/drivers/serial/ifxmips.c')
| -rw-r--r-- | target/linux/ifxmips/files/drivers/serial/ifxmips.c | 551 |
1 files changed, 0 insertions, 551 deletions
diff --git a/target/linux/ifxmips/files/drivers/serial/ifxmips.c b/target/linux/ifxmips/files/drivers/serial/ifxmips.c deleted file mode 100644 index 4d35dc7fc7..0000000000 --- a/target/linux/ifxmips/files/drivers/serial/ifxmips.c +++ /dev/null @@ -1,551 +0,0 @@ -/* - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * Copyright (C) 2004 Infineon IFAP DC COM CPE - * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> - * Copyright (C) 2007 John Crispin <blogic@openwrt.org> - */ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/irq.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/uaccess.h> -#include <linux/bitops.h> - -#include <asm/system.h> - -#include <ifxmips.h> -#include <ifxmips_irq.h> - -#define PORT_IFXMIPSASC 111 - -#include <linux/serial_core.h> - -#define UART_DUMMY_UER_RX 1 - -static void ifxmipsasc_tx_chars(struct uart_port *port); -extern void prom_printf(const char *fmt, ...); -static struct uart_port ifxmipsasc_port[2]; -static struct uart_driver ifxmipsasc_reg; -extern unsigned int ifxmips_get_fpi_hz(void); - -static void ifxmipsasc_stop_tx(struct uart_port *port) -{ - return; -} - -static void ifxmipsasc_start_tx(struct uart_port *port) -{ - unsigned long flags; - local_irq_save(flags); - ifxmipsasc_tx_chars(port); - local_irq_restore(flags); - return; -} - -static void ifxmipsasc_stop_rx(struct uart_port *port) -{ - ifxmips_w32(ASCWHBSTATE_CLRREN, port->membase + IFXMIPS_ASC_WHBSTATE); -} - -static void ifxmipsasc_enable_ms(struct uart_port *port) -{ -} - -#include <linux/version.h> - -static void ifxmipsasc_rx_chars(struct uart_port *port) -{ - struct tty_struct *tty = port->state->port.tty; - unsigned int ch = 0, rsr = 0, fifocnt; - - fifocnt = ifxmips_r32(port->membase + IFXMIPS_ASC_FSTAT) & ASCFSTAT_RXFFLMASK; - while (fifocnt--) { - u8 flag = TTY_NORMAL; - ch = ifxmips_r32(port->membase + IFXMIPS_ASC_RBUF); - rsr = (ifxmips_r32(port->membase + IFXMIPS_ASC_STATE) & ASCSTATE_ANY) | UART_DUMMY_UER_RX; - tty_flip_buffer_push(tty); - port->icount.rx++; - - /* - * Note that the error handling code is - * out of the main execution path - */ - if (rsr & ASCSTATE_ANY) { - if (rsr & ASCSTATE_PE) { - port->icount.parity++; - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_WHBSTATE) | ASCWHBSTATE_CLRPE, port->membase + IFXMIPS_ASC_WHBSTATE); - } else if (rsr & ASCSTATE_FE) { - port->icount.frame++; - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_WHBSTATE) | ASCWHBSTATE_CLRFE, port->membase + IFXMIPS_ASC_WHBSTATE); - } - if (rsr & ASCSTATE_ROE) { - port->icount.overrun++; - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_WHBSTATE) | ASCWHBSTATE_CLRROE, port->membase + IFXMIPS_ASC_WHBSTATE); - } - - rsr &= port->read_status_mask; - - if (rsr & ASCSTATE_PE) - flag = TTY_PARITY; - else if (rsr & ASCSTATE_FE) - flag = TTY_FRAME; - } - - if ((rsr & port->ignore_status_mask) == 0) - tty_insert_flip_char(tty, ch, flag); - - if (rsr & ASCSTATE_ROE) - /* - * Overrun is special, since it's reported - * immediately, and doesn't affect the current - * character - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - if (ch != 0) - tty_flip_buffer_push(tty); - return; -} - - -static void ifxmipsasc_tx_chars(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - if (uart_tx_stopped(port)) { - ifxmipsasc_stop_tx(port); - return; - } - - while (((ifxmips_r32(port->membase + IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) - >> ASCFSTAT_TXFFLOFF) != TXFIFO_FULL) { - if (port->x_char) { - ifxmips_w32(port->x_char, port->membase + IFXMIPS_ASC_TBUF); - port->icount.tx++; - port->x_char = 0; - continue; - } - - if (uart_circ_empty(xmit)) - break; - - ifxmips_w32(port->state->xmit.buf[port->state->xmit.tail], port->membase + IFXMIPS_ASC_TBUF); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static irqreturn_t ifxmipsasc_tx_int(int irq, void *_port) -{ - struct uart_port *port = (struct uart_port *)_port; - ifxmips_w32(ASC_IRNCR_TIR, port->membase + IFXMIPS_ASC_IRNCR); - ifxmipsasc_start_tx(port); - ifxmips_mask_and_ack_irq(irq); - return IRQ_HANDLED; -} - -static irqreturn_t ifxmipsasc_er_int(int irq, void *_port) -{ - struct uart_port *port = (struct uart_port *)_port; - /* clear any pending interrupts */ - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_WHBSTATE) | ASCWHBSTATE_CLRPE | - ASCWHBSTATE_CLRFE | ASCWHBSTATE_CLRROE, port->membase + IFXMIPS_ASC_WHBSTATE); - return IRQ_HANDLED; -} - -static irqreturn_t ifxmipsasc_rx_int(int irq, void *_port) -{ - struct uart_port *port = (struct uart_port *)_port; - ifxmips_w32(ASC_IRNCR_RIR, port->membase + IFXMIPS_ASC_IRNCR); - ifxmipsasc_rx_chars((struct uart_port *)port); - ifxmips_mask_and_ack_irq(irq); - return IRQ_HANDLED; -} - -static unsigned int ifxmipsasc_tx_empty(struct uart_port *port) -{ - int status; - status = ifxmips_r32(port->membase + IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK; - return status ? 0 : TIOCSER_TEMT; -} - -static unsigned int ifxmipsasc_get_mctrl(struct uart_port *port) -{ - return TIOCM_CTS | TIOCM_CAR | TIOCM_DSR; -} - -static void ifxmipsasc_set_mctrl(struct uart_port *port, u_int mctrl) -{ -} - -static void ifxmipsasc_break_ctl(struct uart_port *port, int break_state) -{ -} - -static int ifxmipsasc_startup(struct uart_port *port) -{ - int retval; - - port->uartclk = ifxmips_get_fpi_hz(); - - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_CLC) & ~IFXMIPS_ASC_CLC_DISS, port->membase + IFXMIPS_ASC_CLC); - ifxmips_w32(((ifxmips_r32(port->membase + IFXMIPS_ASC_CLC) & ~ASCCLC_RMCMASK)) | (1 << ASCCLC_RMCOFFSET), port->membase + IFXMIPS_ASC_CLC); - ifxmips_w32(0, port->membase + IFXMIPS_ASC_PISEL); - ifxmips_w32(((TXFIFO_FL << ASCTXFCON_TXFITLOFF) & ASCTXFCON_TXFITLMASK) | ASCTXFCON_TXFEN | ASCTXFCON_TXFFLU, port->membase + IFXMIPS_ASC_TXFCON); - ifxmips_w32(((RXFIFO_FL << ASCRXFCON_RXFITLOFF) & ASCRXFCON_RXFITLMASK) | ASCRXFCON_RXFEN | ASCRXFCON_RXFFLU, port->membase + IFXMIPS_ASC_RXFCON); - wmb(); - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_CON) | ASCCON_M_8ASYNC | ASCCON_FEN | ASCCON_TOEN | ASCCON_ROEN, port->membase + IFXMIPS_ASC_CON); - - retval = request_irq(port->irq, ifxmipsasc_tx_int, IRQF_DISABLED, "asc_tx", port); - if (retval) { - printk(KERN_ERR "failed to request ifxmipsasc_tx_int\n"); - return retval; - } - - retval = request_irq(port->irq + 2, ifxmipsasc_rx_int, IRQF_DISABLED, "asc_rx", port); - if (retval) { - printk(KERN_ERR "failed to request ifxmipsasc_rx_int\n"); - goto err1; - } - - retval = request_irq(port->irq + 3, ifxmipsasc_er_int, IRQF_DISABLED, "asc_er", port); - if (retval) { - printk(KERN_ERR "failed to request ifxmipsasc_er_int\n"); - goto err2; - } - - ifxmips_w32(ASC_IRNREN_RX_BUF | ASC_IRNREN_TX_BUF | ASC_IRNREN_ERR | ASC_IRNREN_TX, port->membase + IFXMIPS_ASC_IRNREN); - return 0; - -err2: - free_irq(port->irq + 2, port); -err1: - free_irq(port->irq, port); - return retval; -} - -static void ifxmipsasc_shutdown(struct uart_port *port) -{ - free_irq(port->irq, port); - free_irq(port->irq + 2, port); - free_irq(port->irq + 3, port); - - ifxmips_w32(0, port->membase + IFXMIPS_ASC_CON); - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_RXFCON) | ASCRXFCON_RXFFLU, port->membase + IFXMIPS_ASC_RXFCON); - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_RXFCON) & ~ASCRXFCON_RXFEN, port->membase + IFXMIPS_ASC_RXFCON); - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_TXFCON) | ASCTXFCON_TXFFLU, port->membase + IFXMIPS_ASC_TXFCON); - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_TXFCON) & ~ASCTXFCON_TXFEN, port->membase + IFXMIPS_ASC_TXFCON); -} - -static void ifxmipsasc_set_termios(struct uart_port *port, struct ktermios *new, struct ktermios *old) -{ - unsigned int cflag; - unsigned int iflag; - unsigned int quot; - unsigned int baud; - unsigned int con = 0; - unsigned long flags; - - cflag = new->c_cflag; - iflag = new->c_iflag; - - switch (cflag & CSIZE) { - case CS7: - con = ASCCON_M_7ASYNC; - break; - - case CS5: - case CS6: - default: - con = ASCCON_M_8ASYNC; - break; - } - - if (cflag & CSTOPB) - con |= ASCCON_STP; - - if (cflag & PARENB) { - if (!(cflag & PARODD)) - con &= ~ASCCON_ODD; - else - con |= ASCCON_ODD; - } - - port->read_status_mask = ASCSTATE_ROE; - if (iflag & INPCK) - port->read_status_mask |= ASCSTATE_FE | ASCSTATE_PE; - - port->ignore_status_mask = 0; - if (iflag & IGNPAR) - port->ignore_status_mask |= ASCSTATE_FE | ASCSTATE_PE; - - if (iflag & IGNBRK) { - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (iflag & IGNPAR) - port->ignore_status_mask |= ASCSTATE_ROE; - } - - if ((cflag & CREAD) == 0) - port->ignore_status_mask |= UART_DUMMY_UER_RX; - - /* set error signals - framing, parity and overrun, enable receiver */ - con |= ASCCON_FEN | ASCCON_TOEN | ASCCON_ROEN; - - local_irq_save(flags); - - /* set up CON */ - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_CON) | con, port->membase + IFXMIPS_ASC_CON); - - /* Set baud rate - take a divider of 2 into account */ - baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16); - quot = uart_get_divisor(port, baud); - quot = quot / 2 - 1; - - /* disable the baudrate generator */ - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_CON) & ~ASCCON_R, port->membase + IFXMIPS_ASC_CON); - - /* make sure the fractional divider is off */ - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_CON) & ~ASCCON_FDE, port->membase + IFXMIPS_ASC_CON); - - /* set up to use divisor of 2 */ - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_CON) & ~ASCCON_BRS, port->membase + IFXMIPS_ASC_CON); - - /* now we can write the new baudrate into the register */ - ifxmips_w32(quot, port->membase + IFXMIPS_ASC_BG); - - /* turn the baudrate generator back on */ - ifxmips_w32(ifxmips_r32(port->membase + IFXMIPS_ASC_CON) | ASCCON_R, port->membase + IFXMIPS_ASC_CON); - - /* enable rx */ - ifxmips_w32(ASCWHBSTATE_SETREN, port->membase + IFXMIPS_ASC_WHBSTATE); - - local_irq_restore(flags); -} - -static const char *ifxmipsasc_type(struct uart_port *port) -{ - if (port->type == PORT_IFXMIPSASC) { - if (port->membase == (void *)IFXMIPS_ASC_BASE_ADDR) - return "asc0"; - else - return "asc1"; - } else { - return NULL; - } -} - -static void ifxmipsasc_release_port(struct uart_port *port) -{ -} - -static int ifxmipsasc_request_port(struct uart_port *port) -{ - return 0; -} - -static void ifxmipsasc_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_IFXMIPSASC; - ifxmipsasc_request_port(port); - } -} - -static int ifxmipsasc_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - int ret = 0; - if (ser->type != PORT_UNKNOWN && ser->type != PORT_IFXMIPSASC) - ret = -EINVAL; - if (ser->irq < 0 || ser->irq >= NR_IRQS) - ret = -EINVAL; - if (ser->baud_base < 9600) - ret = -EINVAL; - return ret; -} - -static struct uart_ops ifxmipsasc_pops = { - .tx_empty = ifxmipsasc_tx_empty, - .set_mctrl = ifxmipsasc_set_mctrl, - .get_mctrl = ifxmipsasc_get_mctrl, - .stop_tx = ifxmipsasc_stop_tx, - .start_tx = ifxmipsasc_start_tx, - .stop_rx = ifxmipsasc_stop_rx, - .enable_ms = ifxmipsasc_enable_ms, - .break_ctl = ifxmipsasc_break_ctl, - .startup = ifxmipsasc_startup, - .shutdown = ifxmipsasc_shutdown, - .set_termios = ifxmipsasc_set_termios, - .type = ifxmipsasc_type, - .release_port = ifxmipsasc_release_port, - .request_port = ifxmipsasc_request_port, - .config_port = ifxmipsasc_config_port, - .verify_port = ifxmipsasc_verify_port, -}; - -static struct uart_port ifxmipsasc_port[2] = { - { - .membase = (void *)IFXMIPS_ASC_BASE_ADDR, - .mapbase = IFXMIPS_ASC_BASE_ADDR, - .iotype = SERIAL_IO_MEM, - .irq = IFXMIPSASC_TIR(0), - .uartclk = 0, - .fifosize = 16, - .type = PORT_IFXMIPSASC, - .ops = &ifxmipsasc_pops, - .flags = ASYNC_BOOT_AUTOCONF, - .line = 0 - }, { - .membase = (void *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_BASE_DIFF), - .mapbase = IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_BASE_DIFF, - .iotype = SERIAL_IO_MEM, - .irq = IFXMIPSASC_TIR(1), - .uartclk = 0, - .fifosize = 16, - .type = PORT_IFXMIPSASC, - .ops = &ifxmipsasc_pops, - .flags = ASYNC_BOOT_AUTOCONF, - .line = 1 - } -}; - -static void ifxmipsasc_console_write(struct console *co, const char *s, u_int count) -{ - int port = co->index; - int i, fifocnt; - unsigned long flags; - local_irq_save(flags); - for (i = 0; i < count; i++) { - do { - fifocnt = (ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + (port * IFXMIPS_ASC_BASE_DIFF) + IFXMIPS_ASC_FSTAT)) & ASCFSTAT_TXFFLMASK) - >> ASCFSTAT_TXFFLOFF; - } while (fifocnt == TXFIFO_FULL); - - if (s[i] == '\0') - break; - - if (s[i] == '\n') { - ifxmips_w32('\r', (u32 *)(IFXMIPS_ASC_BASE_ADDR + (port * IFXMIPS_ASC_BASE_DIFF) + IFXMIPS_ASC_TBUF)); - do { - fifocnt = (ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + (port * IFXMIPS_ASC_BASE_DIFF) + IFXMIPS_ASC_FSTAT)) & ASCFSTAT_TXFFLMASK) - >> ASCFSTAT_TXFFLOFF; - } while (fifocnt == TXFIFO_FULL); - } - ifxmips_w32(s[i], (u32 *)(IFXMIPS_ASC_BASE_ADDR + (port * IFXMIPS_ASC_BASE_DIFF) + IFXMIPS_ASC_TBUF)); - } - - local_irq_restore(flags); -} - -static int __init ifxmipsasc_console_setup(struct console *co, char *options) -{ - int port = co->index; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - ifxmipsasc_port[port].uartclk = ifxmips_get_fpi_hz(); - ifxmipsasc_port[port].type = PORT_IFXMIPSASC; - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - return uart_set_options(&ifxmipsasc_port[port], co, baud, parity, bits, flow); -} - -static struct console ifxmipsasc_console[2] = -{ - { - .name = "ttyS", - .write = ifxmipsasc_console_write, - .device = uart_console_device, - .setup = ifxmipsasc_console_setup, - .flags = CON_PRINTBUFFER, - .index = 0, - .data = &ifxmipsasc_reg, - }, { - .name = "ttyS", - .write = ifxmipsasc_console_write, - .device = uart_console_device, - .setup = ifxmipsasc_console_setup, - .flags = CON_PRINTBUFFER, - .index = 1, - .data = &ifxmipsasc_reg, - } -}; - -static int __init ifxmipsasc_console_init(void) -{ - register_console(&ifxmipsasc_console[0]); - register_console(&ifxmipsasc_console[1]); - return 0; -} -console_initcall(ifxmipsasc_console_init); - -static struct uart_driver ifxmipsasc_reg = { - .owner = THIS_MODULE, - .driver_name = "serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = 2, - .cons = &ifxmipsasc_console[1], -}; - -int __init ifxmipsasc_init(void) -{ - int ret; - uart_register_driver(&ifxmipsasc_reg); - ret = uart_add_one_port(&ifxmipsasc_reg, &ifxmipsasc_port[0]); - ret = uart_add_one_port(&ifxmipsasc_reg, &ifxmipsasc_port[1]); - return 0; -} - -void __exit ifxmipsasc_exit(void) -{ - uart_unregister_driver(&ifxmipsasc_reg); -} - -module_init(ifxmipsasc_init); -module_exit(ifxmipsasc_exit); - -MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); -MODULE_DESCRIPTION("MIPS IFXMips serial port driver"); -MODULE_LICENSE("GPL"); |